我们在网站上有些时候需要给图片加上带版权的水印,.net的Graphics类可以很轻松的实现这一点。
效果图:(图片最上端的那行字便是我们加上的版权水印了)
实现代码:
效果图:(图片最上端的那行字便是我们加上的版权水印了)
实现代码:
/**/
/// <summary>
/// 生成带版权水印的图片
/// </summary>
/// <param name="IconImg">要生成水印图片的文件地址</param>
private void MakeWaterMark( string IconImg)
{
//定义输出位图
Bitmap bmp = new Bitmap(640, 480);
//定义绘图对象
Graphics g = Graphics.FromImage(bmp);
//描述绘图矩形区域
Rectangle newRect = new Rectangle(0, 0, 640, 480);
//设置背景色
g.FillRectangle(new SolidBrush(Color.White), newRect);
//获取要生成水印的图片
Bitmap newBitmap = new Bitmap(IconImg);
g.DrawImage(newBitmap, 16, 16);
//定义水印字的字体
Font font = new Font(
"Arial",
12,
FontStyle.Bold
);
//定义水印字的格式刷
LinearGradientBrush brush = new LinearGradientBrush(
new Rectangle(0, 0, 71, 23),
Color.Red,
Color.Blue,
30f,
true
);
//给照片打上水印
g.DrawString("copyright by test. " + System.DateTime.Now.ToShortDateString(), font, brush, 0, 0);
//保存为新的输出图片
System.IO.MemoryStream ms = new System.IO.MemoryStream();
bmp.Save(ms, ImageFormat.Jpeg);
//输出图片
Response.ClearContent();
Response.ContentType = "image/jpeg";
Response.BinaryWrite(ms.ToArray());
}
/// 生成带版权水印的图片
/// </summary>
/// <param name="IconImg">要生成水印图片的文件地址</param>
private void MakeWaterMark( string IconImg)
{
//定义输出位图
Bitmap bmp = new Bitmap(640, 480);
//定义绘图对象
Graphics g = Graphics.FromImage(bmp);
//描述绘图矩形区域
Rectangle newRect = new Rectangle(0, 0, 640, 480);
//设置背景色
g.FillRectangle(new SolidBrush(Color.White), newRect);
//获取要生成水印的图片
Bitmap newBitmap = new Bitmap(IconImg);
g.DrawImage(newBitmap, 16, 16);
//定义水印字的字体
Font font = new Font(
"Arial",
12,
FontStyle.Bold
);
//定义水印字的格式刷
LinearGradientBrush brush = new LinearGradientBrush(
new Rectangle(0, 0, 71, 23),
Color.Red,
Color.Blue,
30f,
true
);
//给照片打上水印
g.DrawString("copyright by test. " + System.DateTime.Now.ToShortDateString(), font, brush, 0, 0);
//保存为新的输出图片
System.IO.MemoryStream ms = new System.IO.MemoryStream();
bmp.Save(ms, ImageFormat.Jpeg);
//输出图片
Response.ClearContent();
Response.ContentType = "image/jpeg";
Response.BinaryWrite(ms.ToArray());
}